Metalworking machine



Sept. 22, 1936. G. o. GRIDLEY ET ALv METALWORKING MACHINE Filed July 16, 1931 18 Sheets-Sheet l NNN pt. 22, 1936. G. o. GRIDLEY Er AL 2,055,435

METALWORKING' MCHINE Fi1ed July 16, 1931 18 sheets-sheet 2 ATTORNEY.

Filed July 16, 1931 18 Sheets-Sheei'l 3 INVENZI'ORS i ATTORNEYS Sept 22, 1936- Gf o. GRIDLEY Er Al. 2,055,435

' METALwoRKING MACHINE ATTORNEYW G. O. GRIDLEY E1' AL CHINE Sept. 22, 193s.

y y Mmm Sept. 22, 1936. G. o. GRIDLEY ET AL METALWORKING MACHINE 1a sheets-shawls Filed July 16, 1931 AT'ORN EYS s612522, 1936. G. o. GRlDLr-:Y Er A L 2,055,435

METALWORKING MACHINE Filed July 16, 19,31 18 Sheets-#Sheet 9 Sept. 22, 1936. G. o. GRIDLEY Er AL.

METALWORKING MACHINE Filed July 16, 1931 18 Sheets-Sheet 10 l VENTOR.

BY ff. ATTORNEYJ.

Sept' 22, 1935- G. o. GRIDLEY Er AL 2,055,435

METALWORKING MACHINE Y Filed July 16, 1931 1 18 Sheets-Sheet 11 GIN-EWS @mw Sept 22, 1936 AG. Q GRIDLEY ET AL 2,055,435

METALWORKING MACHINE Fiied July 1e, 1931 18 sheets-sheet 12 nqvranrroRC 5. c. d

A ATTORNEY;

Sept. 22,I 1936. G. o. GRIDLEY 'Er AL 2,055,435' Y METALWORKING MACHINE l Filed July 16, 1931 18 sheets-Sheet l5 @4'9" .I J5@ c? INVENTORS o.

ATTORNEYS.

Sept- 22, 1936. sfo. GRIDLEY ET A| f I 2,055,435

METLwoRKING MACHINE Filed July 16, 1931 18 Sheets-Sheet 1 4 INVENTORS 6. a. wmv

ATTORNEYS.

Sept' 22,1936 GI o. GRIDLEY ET AL 2,055,435

METALwoRKING MACHINE Filed July 16, 1931 18 Sheets-Sheel'I l5 ATTORN EYS.

Sept. 22, 1936.

G. o. GRIDLEY ET AL METLWORKING MACHINE Filed .July 16, 1931 18 Sheets-Sheet 16 MMM www

NVFTNTORS M ATTORNEYS.

,sept- 22, 1936- G. o. GRIDLEY Er AL 2,055,435

'METALWORKING MACHINE Filed July 16, 1931 18 Sheets-Sheet 17 Zi m INVENTORS 2;/ A'ITORNEY5.

Sept' 22, 1936-- G. o. GRIDLEY ET AL, 2,055,435

METALWORKING MACHINE Filed July I6, 1931 18 Sheets-Sheet 18 n l'NENTRs` BY gif/SW7 www ATTORNEYs.

Patented Sepe 22, 1936 UNITED STATES PATENT ori-lcs METALWonKlNG MACHINE `Greorge 0. Gridley ad Donald H. Montgomery,

The invention relates to a metal working ma- Berlin, and. Earl H. assignors, by

mesne assignments, Britain Machine Company,

Wheeler, Hartford, Conn.,

to The New New Britain, Conn.,

a corporation of Connecticut Application July 16, `1931, Serial No. 551,136

96 Claims.

chine and will be described as embodied in a multiple spindle machine.

screw machine and chucking It is to be observed, however, that various features of the invention are of broader application' and may be advantageously embodied in machines of other types.'

It is a general object of the invention to'provide a machine of the character indicated, having many improvedl structural and functional features, producing a machine which is exceedinglynexibie, of

tion, and capable of turning out work of great sturdy and compact construcaccuracy at an exceedingly high rate of speed.

It is a more specific object to provide an improved cross slide facture, very sturdy and Another object arrangement, simple to manuaccurate in action. is to provide an improved tool slide guiding means.

It is a further object to provide a machine of the character indicated, wherein rotating tools may be located opposite any or .all of the=spindles of an indexable carrier.

Another object character indicated spindles compared with is to provide a machine of the with exceedingly short those heretofore in use and which are capable of working at exceedingly high speeds without undue wear or impairment of accuracy.

It is another chucking means,

object to provide improved work simple in construction and op- 1 eration, and readily adjustable to compensate for wear. A Another object with spindle bores to provide a spindle carrier to interchangeably f receive large diameter spindles supported on small antifriction bearings, supported on larg and smaller diameter spindles er anti-friction bearings.

Another object is to provide a bar machine with a stock reel positively indexable with carrier.

the spindle It is still another object to provide an improved spindle driving means tion may be initiated by a positively driven by Another object whereby the spindle rotaa positive clutch.

is to provide a machine of the character indicated with rotating spinidles in,

which uid pressure pressure actuate chucking devices and fluid d clutching devices may be pressure chuckin g devices and manual control means for rendering it possible to actuate any chuck in a group of chucks at will.

friction clutch and y Several other objects and various features of invention will be hereinafter-pointed out or will become apparent.

As stated, the invention will be described as embodied in a so-called multiple spindle screw machine and a chucking machine.

Ina preferred form and speaking generally, the machine comprises a frame or base supporting a power case for driving mechanism and opposite thereto aspindle carrier case or head for supporting the spindle carrier and various associated mechanisms... A top plate or tie bar Serves to connect the spindle carrier end of the frame to the power case end thereof. The machine axis, which is the axis of the spindle drive shaft.

Forming or cross tool slides are preferably located symmetrically relatively to the spindle carrier, so that work carried by each spindle may be simultaneously operated on by forming tools. End working tools, either rotatable or non-rotatable, mayJ alsov act on work carried by each lspindle in each position. 'I'he machine is arranged for rotating end working tools located opposite any or every station of the spindle carrier, which tools may with great facility be rotated in either direction.

The pump arrangement is such that cutting iiuid at low pressure may be copiously supplied where needed, and cutting iluid. under high pressure may be supplied for such operations as deep hole drilling requiring such high pressure.

Theymachine may be arranged for continuous automatic operation or may be manually set, so

as to knock ofi after each index. The spindles, which are readily interchangeable so as to convert the machine from one size to another, are arranged for exceedingly high speed rotation without undue wear and improved chucking means have been provided.

The stock reel for the bar machine may be positively indexed with the spindle carrier, thus removing all indexing strain from the bars of stock so as to prevent wind up and whipping of the stock reel due to the high rate of speed of index.

The bar machine as modified to constitute a chucking machine preferably embodies fluid `pressure vactuated chucking means and uid pressure actuated spindle clutch means, ,which are so correlated as to facilitate the high speed progenerally is symmetrically designed about a single l The various features just generally mentioned and others of importance will be described more in detail hereinafter.

In the drawings which show, for illustrative purposes only, preferred forms .of the invention- Fig. 1 is a front view in elevation ofva screw machine embodying features of the invention, some of the cover plates being removed to expose interior construction;

Fig. 2 is an end view in elevation of the power case or driving end of the machine disclosed in Fig. 2, a cover plate being removed;

Fig. 3 is a sectional view taken substantially in the plane of the line 3 3 of Fig. 2;

Fig. 4 is a sectional view taken substantially in the plane of the line 4 4 of Fig. 3;

Fig. 4a is a fragmentary side view in partial section of a work stop and views taken substantially in the planes of the lines aand b b in the directions of the arrows; f

Fig. 5 is a sectional view taken substantially in the plane of the line 5 5 of Fig. 3;

Fig. 6 is a sectional view through a part of the frame and illustrating two of the pumps employed in the machine;

Fig. '1f is an enlarged sectional view taken substantially in the plane of the line 1 1 of Fig. 1, illustrating particularly a tool slide guide; l

Fig. 8 is a sectional view taken substantially in the plane of the line 8 8 of Fig. l, parts being broken away to illustrate interior construction;

Fig. 9 is a central sectional view taken substan tially in the plane of the line 9 9 of Fig. 8;

Fig. 10 is a, sectional view taken substantially in the plane of the line I I0 of Fig. 9;

Fig. 11 is a sectional view taken substantially in the plane of the' line Il II of Fig.l9;

- Fig. 12 is a sectional view taken substantially in the plane of the line I2` I2 of Fig. 9;

Fig. 13 is an enlarged detail view in partial section of a spindle and associated trating features of the invention;

Fig. 14 is a view similar to Fig. 13, but showing a spindle of smaller size but with larger bearings;

Fig. 15 is a fragmentary view of the spindle carrier end of the machine and illustrating a stock reel positively indexable with the spindle carrier;

Fig. 16 is a sectional in the plane of the line I6 I6 of Fig. l5;

Fig. 17 is an end view in partial section, parts being broken away, of the spindle carrier end of the machine embodied as a chucking `machine;

Fig. 18 is a sectional view taken substantially in the plane of the line I8 I8 of Fig. 17;

Fig. 19 is a view taken `substantially in the plane of the line I9 I9 of Fig. 17;

Fig. 20 is a sectional view taken substantially in the plane of the line 29-20 of Fig. 19.

Fig. 20a is a view similar to Fig. 20 but taken substantially in the plane of the line 20a-20a of Fig. 19;

Fig. 21 is a fragmentary view in partial section of chuck and clutch controlling means shown in part in Fig. 1'1;

Fig. 22 is a view in section of parts shown in Fig. 21, the section being taken substantially in the plane of the line 22 22 of Fig. 17;

Fig. 23 is a diagrammatic view of a iluid pressure actuated chucking and clutching mechanism for a chucking machine.

The machine .as embodying a screw machine will first be described, and thereafter the modications necessary for converting to a chucking machine will be set forth.

parts illusview taken substantially at different speeds during each and 9 and the-drive sprocket II .drive worm 23.

Referring to Fig. 1, the machine comprises a base I having a power case or drive mechanism support 2 and a spindle carrier head designated generally 3. The power case and spindle carrier head are connected by a top plate or tie bar 4, to provide a machine 4 frame of great rigidity and also to serve when necessary as atool slide guide or support for auxiliary slides or attachments. The spindle carrier has a plurality of rotatable work spindles, which are driven from a shaft extending from the power case. The feed works are also driven from the power case, preferably cycle of the machine.

The powe1- case end Power may be supplied to the machine as from an electric motor (Figs. 1 and 2) supported within the base I. with a high speed shaft 6, carrying a sprocket 1, and is also provided with a spindle drive shaft and slow speed cam drive shaft 8, carrying a sprocket 9. A chain I 0 connects the sprockets 1 on the 4motor shaft. The spindle drive shaft 8, as will be later described, -is also employed for the slow speed cam drive. A suitable spring'pressed or other type of chain tightener I2 is employed for maintaining the chaintaut.

The drive shaft 8 passes into the power case and carries a pinion I 5, meshing witha back gear I6, which has non-rotatably secured thereto a second back gear I1, meshing with a gear I8 directly driving the spindle drive shaft I3 (Fig. 4) and worm I4. The spindle drive shaft I3 extends to the spindle carrier and drives the spindles, as will be later described. The sprocket 9 on the illustrated particularly in Figs. 1 and 4, the worm I4 meshes with a worm gear I9 on a suitable supported shaft 20, carrying at its outer end a change gear 2I. The change gear 2| meshes with a second change gear 22, and nally drives the cam For a purpose to be later de'- worm 23 to be clutched and unclutchedfrom the shaft carrying the gear 22. Obviously, by means of the change gears 2|, 22, any desirable slow speed may be imparted to the worm` 23, and consequently to the worm` gear 26, which drives the main cam shaft 21. The worm gear 26 is preferably frictionally secured to the cam drive shaft 21, so that, in case of abnormal resistance to the rotation of the cam shaft 21, the worm gear 26 will slip and give time for the thermal overload orother safety device on the motor to act, and will avoid serious damage to the other parts of the machine.

The high speed drive for the main cam shaft 21 starts from the chain sprocket 1 and shaft 6 (Figs. 2 and 3).

The power case is provided 

